I ran it through Google's translator and, after some adjustments, came up with the following:

Hello. We have received your letter, I do not know if we are relatives but my maternal grandfather's surname was Di Nallo. He was born in 1926. His father was Angelo Di Nallo, born 1902. His father's father was Domenico Di Nallo, born in 1859, and had two sisters: Maria Giseppa Di Nallo and Maria Antonia Di Nallo. There are many Di Nallo's in Cassino who are most likely related, even if distant.